Joist hanger



Aug. 16', 1927.

K C. S. BOARDMAN ET AL JOIST HANGER 2 Sheets-Sheet 1 Filed March 23. 1926 u Il Aug. 16, 1927. 1,639,483

c. s. BoAr-DMAN ET AL A JoIsT HANGER Filed March 25. 1926v 2 Sheets-Sheet 2 :imma/Jew ,Char/es 5'. adrdmam,

Jaln W. Fr-ee Patented Aug. 16, `1927.

UNETQED vSTATES i 1,539,483 PATENT-OFFICE.

CHARLES S. BOARDMAN, OF PIL'TTSBURGH,AND JOHN lV. FREE, OF WOODLAWN BOROUGH, PENNSYLVANIA, ASSIGNORS TO JONES 8a LAUGHLIN STEEL CORPORA- TION, OF P'I'TSBURGH, PENNSYLVANIA,KA. COEBOBATION OF PENNSYLVANIA.

JOIST HANGER.

This invention relates particularly to and aims to provide a positioning and supporting means for such beams and jcists for connecting them to the glrders and headers of a steel struct-ure, and for supporting pipes and ductsand portionsv of the ceiling struc` ture. A further object is to provide a light,

strong hanger which may be readilyinanu-v factured by commercial methods and easily installed without special tools, and which requires nordrilling or preparation of the supporting structureor joist to receive it.

Further objects and advantages ofthe in vention will appear from the description of the illustrative embodiments shown in the ac-V companying drawings, wherein Fig. 1 is a side view and Figs; 2 and 3 a plan view'and end view, respectively, of a double hanger for supporting the abutting ends of two joists from an intervening I-beam, showing thejoists and beam in place;

Fig. 4 isa side view of a singlehanger for use with a channel., shape supporting beam or girder; y

Figs. 5, 6 and 7 are views similar to Figs. 1, 2 and 3 of a modiiied form of double hanger; and

Figs. 8 and 9 are plan views of spacing and securing clips used with these hangers.

Referring` to Figs. 1, 2 and 3, the double hangers illustrated therein kcomprises a pair ofangle bars 10, disposed side by side and connected at their lends by two U-shaped straps 11. The angle bars may be placed across the top flange cof a -girder 12, with the strips disposed on opposite sides of the girder andhanging down like stirrups in position to receive and support the adjacent ends of the steel jcists 13. The upper ends of thef straps are advantageously bent over the vertical flanges or legs of the angles, and may be riveted or welded thereto in order to make them secure.v c

The horizontal flanges or legs of the angles are preferably Adisposed to face outwards, and are sheared or notched at their outer edges to form two prongs 14,as shown in dotted lines in Fig. 1, which embrace the top flange-s of the girder and serve to position the hanger thereon similarly to a saddle. These prongs 14 may be bent around under the top liangeto secure the hanger in position as shown' and clamp it from movement lengthwise of the girder. Spacingclips 15 are fitted over the lower or bearing` portions of the U-straps to embrace them and lill the gaps between the straps and web of the girder 12. .These clips are held in place by the weight of the steel joists 13, the ends of which rest upon the clips and resist any tendency of the U- straps to deflectA inwards towards the girder under the weight of the joists.

The single hanger shown in Fig. 4 is designed for use with a rchannel girder, and 'comprises angle bars 16 with positioning prongs 17 cut from the horizontal flanges to engage the vtop flange ofthe channel 18, and a stirrup 19 suspended therefrom with a spacing clip 2O to support the end of the steel joist 21. Y The single hanger'maybe designed forusc vwith an I-beam support equally well by lengthening the saddle portions of the anglebars 16 to suit the wider top flange of the I-beam. n

The positioning or saddle prongs may easily .be bent to engage under the top flange by means of an ordinary hammer so Tas to secure the hangers in proper place lengthwise of the support to suit Ythe desired spacing of the joists prior to raising the latter to position in the structure, so that the jcists may bepermanently set as fast as they are raised to place. The joists need only to-be cut to length before being set in place, and this may be done in advance of raising them,- either in the shop or on' the ground, as may be most convenient.

In th-e'hanger shown in Figs. 5, 6 and 7, the top supporting members 22 may be angle bars or other convenient shapes for supporting the stirrups 23, and are disposed with their ends projecting over the supports 24C further lon one` side than the other, as shown in Fig. 6. The stirrups 23 are provided with notches: 25 on their inner edges which are nearest to the supports 24 to embrace the top flange thereof when in position to receive the joi-sts 26. By twisting the hangers they may be dropped into positionon the sup-A ports, and when turned into alinement with the joists the notches 25 will secure them in place. Clips 27 see Fig. 9) may be fitted to the stirrups to retain them in alinement and prevent their lower ends from being deflected towards the supports by the weight of the joists.

The use of the spacing clips 15, 2O and 27 enables a lighter section saddle bar'to carry the weight of the joists than would be safe without it, as thereby the saddle bars are relieved of bending stresses and it is only necessary to make them heavy 'enough to sustain the shearing stresses due to the vertical load upon the end of each joist.

A further advantage ot these spacing clips i is Lthe ready means thereby provided for supporting the ceiling structure adjacent to the supporting girders, and for supporting pipes, wires, electrical con-duits, and other things that it is desired to install in the floor structure extending' croiswise of the ends of the floor beams.

It is obvious that hangers embodying the invention may be adapted to various types and dimensions of supporting members having top anges, and may advantageously be used tor supporting joists yand beams of various types.

rIhe invention is not restricted t0 the particular shapes shown, and may be adapted by change of one or two dimensions only to meet the usual conditions of service.

IVe claim the following as our invention.

l. A joist hanger or the like comprising a. support, a saddle member arranged on said support, a stirrup member depending from the saddle member and secured thereto at its upper end, and a spacing clip carried by said stirrup to prevent movement of said stirrup toward said support.

2. A joist hanger or the like comprising saddle members adapted to embrace the top flange oit a supporting beam or girder member, a stirrup member suspended from the projecting ends of said saddle members and a clip embracing the stirrup member to form a seat for the joist, said clip extending inwards towards the web of the supporting member.

3. In combination with a joist hanger for straddling a flanged beam having a web, and comprising a depending stirrup forming a support for the joist and spaced from the web, a clip carried by the stirrup and engaging the web to prevent movement of the stirrup inwards toward the web under the weight ot the joist.

fl. In combination with a joist hanger for straddling a flanged beam having a web, and comprising a depending stirrup forming a support tor the joist and spaced from the web, a clip seated on the stirrup and engaging thev web to prevent movement of the stirrup inwards toward the web under the ing inwards tow rds the web of the supporting members to term extensions ot' the lower flanges oi' said Joists.

6. A joist hanger or the like comprising.

saddle members adapted to engage the top lange of the supporting beam or girder member, stirrup members vsuspended from the projecting ends of said saddle members on opposite sides of the supporting member, said stirrups having provision for engaging said flange, and clips embracing the stirrup members to form seats for the joists, said clips extending inwards towards the web of the supporting members to form extensions of the lower flanges of said joists and prevent lateral or twisting movement of th hanger thereon.

7. In combination with a beam and transversely disposed joists supported therefrom at their ends, beam hangers comprising saddle members straddlingthe joists and having` 4stirrup portions depending from `their extremities and spaced from the web of the beam, the ends of the joists being suspended thereby from the top flange of 'the beam and spaced from its web, and supporting members carried by said hangers in approximate alinement with the lower flanges of said'joists and extending inwards towards said web to enclose the spaces between the ends of the joists and the web of the beam.

8. In combination with a beam and transversely disposed joists supported therefrom at their ends, beam hangershaving stirrup portions depending 'from their extremities and spaced from the web of the beam, the ends oi' the joists being suspended thereby from the top flange of the beam and spaced from its web, and .supporting members carried b v said stirrup members in approximate alinement with the lower flangesl of said joists and extending inwards towards said web to support portions of the floor in the spaces between the ends of the joists and the web of the beam.

In testimony whereof, we have signed our names to this specification.

CHARLES S. BOARDMAN. JOI-IN W. FREE.

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